4c72fefce81c758c0293daf045fae31837a9a932b5a2a343c655bc3c755db5ea

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
27-04-2024 22:35

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-04-27_8a0a0ce92797e3559d112769d1b3375e_cryptolocker.exe
Size

87KB
MD5

8a0a0ce92797e3559d112769d1b3375e
SHA1

cf02b22ef91a699d225de274941bc0d0000ae8a0
SHA256

4c72fefce81c758c0293daf045fae31837a9a932b5a2a343c655bc3c755db5ea
SHA512

12cb656044be4a5ca7e84ba7391a29952fb1de91eb618cef6c0e7a87c6ff891c2661037955be2a7460e7ab5cf3aad23555c6dcdec9619319daef3465e8ff82dc
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMg5D:AnBdOOtEvwDpj6zp

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1676-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/1676-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1468-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1468-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1676-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/1676-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1468-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1468-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1676-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/1676-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1468-19-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1468-28-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

2024-04-27_8a0a0ce92797e3559d112769d1b3375e_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	2024-04-27_8a0a0ce92797e3559d112769d1b3375e_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

1468 asih.exe

pid	process
1468	asih.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral2/memory/1676-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/1676-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1468-19-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1468-28-0x0000000000500000-0x000000000050F000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-27_8a0a0ce92797e3559d112769d1b3375e_cryptolocker.exe

description	pid	process	target process
PID 1676 wrote to memory of 1468	1676	2024-04-27_8a0a0ce92797e3559d112769d1b3375e_cryptolocker.exe	asih.exe
PID 1676 wrote to memory of 1468	1676	2024-04-27_8a0a0ce92797e3559d112769d1b3375e_cryptolocker.exe	asih.exe
PID 1676 wrote to memory of 1468	1676	2024-04-27_8a0a0ce92797e3559d112769d1b3375e_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-27_8a0a0ce92797e3559d112769d1b3375e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_8a0a0ce92797e3559d112769d1b3375e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1676

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:1468

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
87KB

MD5
2e675c36cfdceefe9a66e971f6db0211

SHA1
9a471217e5f5567b4371695fad61d45da1543661

SHA256
ccb4657d30eba53671b8f9686de78078e2f3b3a98b658780877633dc12b29aca

SHA512
274379e3f55be5a92837a81a6e6aedb65c2b257ae5468602e94413d0a1099805f63ea976e52ec9085aa79dfa09fe3d9d2a18021d26c12459edcbccb9821c4664

Download Submit
memory/1468-19-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1468-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1468-27-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1468-28-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1676-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1676-1-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/1676-2-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/1676-9-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/1676-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download